protected void onTick() {
  ((AActuator) myAgent).calculateNewValue();
  if(((AActuator)myAgent).value > 0) {
    ACLMessage message = new ACLMessage( ACLMessage.INFORM );
    message.setContent(AMessage.constructMessage((Messageable)myAgent, AMessage.MessageType.EMIT));
    AMessage.broadcastToAll((Messageable)myAgent, message);
  }
}